#include <iostream>
#include <string>

using namespace std;
int main(int argc,char* argv[])
{
     string argunment=argv[1];
       for(int i=0;i<argc;i++)
       {
            cout<<"argv["<<i<<"] : " << argv[i]<<endl;
               
       }
         if(argunment=="-a")
         {
                cout<<"hello -a"<<endl;
                   
         }
           else 
           {
                  cout<<"hello -b"<<endl;
                     
           }

}
